JPS5641824A - Manufacture of caustic soda - Google Patents

Manufacture of caustic soda

Info

Publication number
JPS5641824A
JPS5641824A JP11439379A JP11439379A JPS5641824A JP S5641824 A JPS5641824 A JP S5641824A JP 11439379 A JP11439379 A JP 11439379A JP 11439379 A JP11439379 A JP 11439379A JP S5641824 A JPS5641824 A JP S5641824A
Authority
JP
Japan
Prior art keywords
evaporators
evaporator
salt
fed
caustic soda
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11439379A
Other languages
Japanese (ja)
Inventor
Takehiko Nakashiki
Hideaki Tsuji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
IHI Corp
Original Assignee
IHI Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by IHI Corp filed Critical IHI Corp
Priority to JP11439379A priority Critical patent/JPS5641824A/en
Publication of JPS5641824A publication Critical patent/JPS5641824A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B1/00—Electrolytic production of inorganic compounds or non-metals
    • C25B1/01—Products
    • C25B1/34—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis
    • C25B1/46—Simultaneous production of alkali metal hydroxides and chlorine, oxyacids or salts of chlorine, e.g. by chlor-alkali electrolysis in diaphragm cells

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

PURPOSE:To enhance the quality of purified salt fed to a salt water purifying process by allowing an electrolyte to complicatedly flow to a group of evaporators in a concentrating process when caustic soda is manufactured by a diaphragm electrolytic method. CONSTITUTION:In a concentrating process an electrolyte is first fed to the 2nd evaporator V2, passed through the 4th, 3d and 1st evaporators V4, V3, V1 in order, and sent to a cooling and filtering process through flash tank F1. On the other hand, heating steam is introduced into heater E1 of evaporator V1, and steam generated from each evaporator is used as a heat source for the next evaporator (in the order of V2-V4). High purity NaCl deposited in evaporators V2, V4 is taken out of leg L4 of V4 as pure salt, and Na2SO4-contg. NaCl deposited in evaporators V1, V3 is taken out of leg L3 of V3 as impure salt, which is then freed of the Na2SO4 to obtain purified salt fed to a salt water purifying process.
JP11439379A 1979-09-06 1979-09-06 Manufacture of caustic soda Pending JPS5641824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11439379A JPS5641824A (en) 1979-09-06 1979-09-06 Manufacture of caustic soda

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11439379A JPS5641824A (en) 1979-09-06 1979-09-06 Manufacture of caustic soda

Publications (1)

Publication Number Publication Date
JPS5641824A true JPS5641824A (en) 1981-04-18

Family

ID=14636546

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11439379A Pending JPS5641824A (en) 1979-09-06 1979-09-06 Manufacture of caustic soda

Country Status (1)

Country Link
JP (1) JPS5641824A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2321223A1 (en) * 2008-08-07 2011-05-18 Vinyl Corporation Westlake Catholyte heat recovery evaporator and method of use

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2321223A1 (en) * 2008-08-07 2011-05-18 Vinyl Corporation Westlake Catholyte heat recovery evaporator and method of use
US8317994B2 (en) 2008-08-07 2012-11-27 Westlake Vinyl Corporation Method of concentrating an aqueous caustic alkali using a catholyte heat recovery evaporator
EP2321223A4 (en) * 2008-08-07 2013-05-22 Westlake Vinyl Corp Catholyte heat recovery evaporator and method of use

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